Rotary valve and piston pump assembly and tank dispenser therefor

ABSTRACT

A rotary valve, a piston pump rotary valve assembly and a piston pump rotary valve assembly tank dispenser for use in discharging a metered amount of liquid, gel, or slurry has a valve body having a first channel pathway and a second channel pathway. The first channel pathway has an inlet opening to receive a liquid, gel, or slurry and an outlet opening to provide the same to a pathway of the piston pump assembly. The second channel pathway is segregated from the first channel pathway and includes a plurality of inlet openings, each capable of communicative alignment with the pathway of the piston pump assembly, and at least one outlet opening communicative with such inlet openings. The valve body is capable of rotation with respect to the piston pump assembly to dispose both the first channel pathway and the second channel pathway each to two operative positions to receive the liquid, gel, or slurry and to two inoperative positions blocking fluid communication with the liquid, gel, or slurry.

BACKGROUND OF THE INVENTION

1. Field of the Invention.

The present invention relates generally to an alternate recharge anddischarge rotary valve for use in a piston pump assembly to discharge ametered amount of liquid, gel, or slurry, and particularly a rotaryvalve having a first channel pathway segregated from a second fluidpathway, the first channel pathway providing a metered amount of liquid,gel, or slurry to a piston bore pathway and the second channel pathwayproviding an exit to dispense the same. The present invention isparticularly useful to dispense gel or slurry used in battery fills,however, it is understood that the invention is not limited to thisparticular application.

2. Description of the Related Art.

A variety of metering piston pumps are used in many environments were aprecisely measured quantity of a liquid is required to be dispensed.Examples of such applications are in the packaging of liquid medicamentsand perfumes. A typical metering pump for this purpose employs areciprocating plunger to draw a charge of liquid into a cylinder andthen expelled the charge from the pump at each reciprocation of theplunger. The liquid enters and leaves the cylinder through the sameport, and a rotary valve is provided to place the port, alternatively,in communication with the supply of liquid and an outlet from the pump.However both entry and exit of the metered liquid into a cylinder fromthe same port can be disadvantageous, particularly in a number ofmetering piston pump applications involving dense liquids, gel, orslurries. In such applications the consistency of the dispensed liquid,gel or slurry can vary, contain contaminants, form lump-like portions,or develop cling sediment, thereby causing problems of restricted orclogged entry or dispensing pathways.

SUMMARY OF THE INVENTION

In accordance with the present invention there is provided a rotaryvalve for use in a piston pump assembly to discharge a metered amount ofliquid, gel, or slurry comprising a valve body having a first channelpathway and a second channel pathway. The first channel pathway has aninlet opening to receive a liquid, gel, or slurry and an outlet openingto provide the liquid, gel, or slurry to a pathway of the piston pumpassembly. The second channel pathway has a plurality of inlet openingseach capable of communicative alignment with the pathway of the pistonpump assembly and at least one outlet opening communicative with saidinlet openings. Preferably the second channel pathway is generallyX-shaped, having an upper distal side opening and an upper proximal sideopening at an upper portion thereof and a lower distal side opening anda lower proximal side opening at a lower portion thereof. The valve bodyis capable of rotation with respect to the piston pump assembly todispose the inlet opening of the first channel pathway to both anoperative position to receive the liquid, gel, or slurry through theinlet opening of the first channel pathway and provide the same to theoutlet opening of the first channel pathway, and an inoperative positionclosing the first channel pathway from fluid communication with theliquid, gel, or slurry. The valve body is further capable of rotationwith respect to the piston pump assembly to separately dispose thesecond channel pathway to an operative position to discharge the liquid,gel, or slurry from the piston pump assembly and an inoperative positionto prevent the discharge. The present invention also encompasses apiston pump rotary valve assembly for use in discharging a meteredamount of liquid, gel or slurry and also such an assembly, andpreferably a plurality of such assemblies in combination with a tankdispenser.

The present invention advantageously provides for a fill or rechargecycle of a metered amount of liquid, gel or slurry from the firstchannel pathway of the rotary valve to a piston pump pathway which isdistinct, divided, and separated from a discharge cycle wherein theliquid, gel or slurry is discharged from the piston pump pathway.Further, the present invention advantageously allows for a four cyclelocation rotation of the rotary valve at each quarter turn thereofrelative to the piston pump pathway which establishes an “alternaterecharge and discharge”, and “fresh-in, fresh-out” mode of operation forthe subject liquid, gel or slurry in the piston pump pathway. Such afour cycle location of the rotary valve provides for a piston pumppathway fill to discharge to fill to discharge sequence relative to thepiston pump assembly. Moreover, by exhausting all liquid, gel or slurryfrom the piston pump pathway during discharge cycles, fresh liquid, gel,or slurry is always provided during fill cycles of the piston pumppathway. Still further, the rotary valve of the present inventionimportantly has an end portion which rotatably functions as an impellerto stir liquid, gel, or slurry within an impeller displacement zonethereby breaking up clumps, sediment, impurities, or lack of consistencyin the liquid, gel, or slurry just prior to entry of the same to thefirst channel pathway of the rotary valve which supplies the liquid,gel, or slurry to the piston pump pathway. Such advantages allow therotary valve, the rotary valve assembly, and the rotary valve assemblytank dispenser of present invention to be used with caustic gels orslurries which contain contaminants, form lump-like portions, orotherwise feature variations in their consistency while limiting oraltogether eliminating development of cling sediment which can causeserious problems of restricted or clogged piston pump or rotary valveentry or dispensing pathways necessitating maintenance and repair andassociated system downtime.

Additional features and advantages of the present invention will becomeapparent to those skilled in the art from the following description andthe accompanying figures illustrating preferred embodiments of theinvention, the same being the present best mode for carrying out theinvention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a piston pump rotary valve assemblyconstructed in accordance with the teachings of the present invention.

FIG. 2 is an exploded perspective view of the piston pump rotary valveassembly of FIG. 1 showing the component parts thereof axially explodedfrom each other.

FIG. 3 is a perspective view of the piston pump rotary valve assembly ofFIG. 1 connected to a fragmentary portion of a tank dispenser and to anactuator capable of rotating the component rotary valve of the pistonpump rotary valve assembly.

FIG. 4 is a side view of the piston pump rotary valve assembly, thefragmentary portion of the tank dispenser, and the actuator of FIG. 3.

FIG. 5 is a perspective view of the component rotary valve of FIG. 2.

FIG. 6 is a top view of the component rotary valve of FIG. 5.

FIG. 7 is a sectional view of the component rotary valve of FIG. 5,taken long lines 7—7 of FIG. 6, and illustrates a first channel pathwayto provide a liquid, gel or slurry to a piston pump pathway.

FIG. 8 a side view of the component rotary valve of FIG. 5.

FIG. 9 is a sectional view of the component rotary valve of FIG. 5,taken long lines 9—9 of FIG. 8, and illustrates a second channel pathwayfor discharge of the liquid, gel or slurry from the piston pump pathway.

FIG. 10 is perspective view of a piston pump rotary valve assembly tankdispenser constructed in accordance with the teachings of the presentinvention and illustrates a plurality of piston pump rotary valveassemblies around a fill tank.

FIG. 11 is a side perspective view of the piston pump rotary valveassembly tank dispenser of FIG. 10 connected to a turret for cooperationwith a product supply.

FIG. 12 is a sectional view of a piston pump rotary valve assemblycommunicative with liquid, gel, or slurry from a fill tank andillustrates a first cycle location of the rotary valve wherein the firstchannel pathway is in a first operative fill position to provide liquid,gel, or slurry to the piston pump pathway.

FIG. 13 is a sectional view of a piston pump rotary valve assemblyblocked from communication with liquid, gel, or slurry from a fill tank,and illustrates a quarter turn of the rotary valve to a second cyclelocation wherein the second channel pathway is in a first operativedischarge position to receive a liquid, gel, or slurry from the pistonpump pathway.

FIG. 14 is a sectional view of a piston pump rotary valve assemblycommunicative with liquid, gel, or slurry from a fill tank, similar toFIG. 12, and illustrates another quarter turn of the rotary valve to athird cycle location wherein the first channel pathway is in anoperative recharge fill position to provide liquid, gel, or slurry tothe piston pump pathway.

FIG. 15 is a sectional view of a piston pump rotary valve assemblyblocked from communication with liquid, gel, or slurry from a fill tank,and illustrates yet another quarter turn of the rotary valve to a fourthcycle location wherein the second channel pathway is in a secondoperative discharge position to receive a liquid, gel, or slurry fromthe piston pump pathway.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings, there is shown in FIG. 1 a perspectiveunitary view of a piston pump rotary valve assembly 10 of the presentinvention while in FIG. 2, the piston pump rotary valve assembly 10 isillustrated with the various component parts thereof axially explodedfrom each other. Piston pump rotary valve assembly 10 includes a pistonpump 12 having a piston 14 axially aligned for operative movement withina piston bore pathway 16 of a piston body 18. Piston body 18 is attachedto an upper surface 20 of a valve housing 22 and a nozzle mount 24servicing attached nozzle 26 is attached at a lower surface 28 of thevalve housing 22. The valve housing 22 includes a housing opening 23(see FIG. 2) to accommodate axial insertion of an inner sleeve 32 intowhich a rotary valve 34 is set.

As better viewed in the vertically exploded component parts illustratedat FIG. 2, the piston 14 includes an outer end 36 which is cooperativewith a reciprocal drive means known within the piston arts to retractthe piston 14 from and drive the same into piston bore pathway 16 of thepiston body 18. Piston body 18 preferably includes a packing assembly 38at an outer end 40 thereof which consists of an arbitrary array ofsealing parts complementary of the piston 14 such as, respectively,lower lip seal 42 and o-rings 44 providing a lower seal to inner sealpacking spacer 46, an outer seal packing spacer 48, an o-ring 50providing an upper seal upon the outer seal packing spacer 48, and anupper lip seal 52. An inner threaded end 54 of the piston body 18 isscrew thread mounted and o-ring 56 sealed to an upper threaded bore 58of the upper surface 20 of the valve housing 22. Once so mounted, thepiston bore pathway 16 of piston body 14 is set in vertical axialalignment with upper bore hole 60 at the upper surface 62 of the innersleeve 32 such as to provide a entry fluid communication from pistonbody 18 through the upper bore hole 60 of inner sleeve 32 to the rotaryvalve 34. Likewise, the nozzle mount 24 has a treaded head 64 which issimilarly screw thread mounted to a lower threaded bore 66 of a lowersurface 68 of the valve housing 22 and o-ring 70 sealed. Once somounted, the nozzle mount is set in a vertical axial alignment toprovide an exit fluid communication from rotary valve 34 through a lowerbore hole 72 at a lower surface 74 of the inner sleeve 32, through thelower threaded bore 66 of the lower surface 68 of the valve housing 22,and to a nozzle mount bore pathway 76 of the nozzle mount 24 for finaldischarge from a nozzle discharge pathway 78 of the nozzle 26. Aspreviously noted, the lower surface 68 of the valve housing 22 has athreaded bore 66 to receive an o-ring 70 sealed inner threaded head 64of the nozzle mount 24. Once the nozzle mount 24 is joined to the valvehousing 22, an outer thread end 80 of the nozzle 26 is thread mounted toan inner thread end 82 of nozzle mount 24. As will be more fullyillustrated and discussed hereinafter, the upper bore hole 60 of innersleeve 32 is offset from and not in vertical axial alignment with thelower bore hole 72 of inner sleeve 32 in order to accommodate a secondchannel pathway 84 of rotary valve 34.

Referring now to the horizontally exploded component parts illustratedat FIG. 2, the rotary valve 34 is axially set within the sleeve opening30 of the inner sleeve 32 and both component parts are sealed withinhousing opening 23 of valve housing 22 by an arbitrary array ofcomplementary sealing parts. In this regard, o-rings 86 and 88 are setupon a proximal end 90 of the rotary valve 34 and o-rings 92 and 94 areset upon a distal end 96 of the rotary valve 34 to provide a distal andproximal seal respectively against a proximal end cap 98 and a distalend cap 100 of the valve housing 22. The proximal end cap 98 and thedistal end cap 100 are each provided with a plurality of corner threadedthrough bores 102, one at each of the four corners of their annular sideperiphery 104, which are complimentary axial aligned such that theproximal end cap 98 and distal end cap 100 can be screw mated throughthe corresponding aligned plurality of corner through holes 106 of valvehousing 22. The valve housing 22 also has a pair of central throughholes 108 which are complimentary axially aligned with central throughholes 110 of proximal end cap 98 so as to accommodate an accurate dowelpin secure attachment of the piston pump rotary valve assembly 10 withcomplementary dowel holes of a fill tank 112 (see FIG. 10).

FIG. 2 further illustrates that a clamp collar 114 may be optionallyprovided for clamp fitting to a inward portion 116 of distal end 96 ofrotary valve 34 while exposing actuator engaging location flats 118 and120 located at and an outer portion 122 of the distal end 96 of therotary valve 34.

The perspective view of FIG. 3 and the side view of FIG. 4 illustratethe piston pump rotary valve assembly 10 described above mounted to afill tank 112 and an actuator 124. In this regard, the piston pumprotary valve assembly 10 at proximal end cap 98 is dowel pin attached asdiscussed above to the fill tank 112. The clamp collar 114 is providedwith a pair of threaded bores 126 such that actuator 124 can be screwset mated to clamp collar 114 by actuator set screws 128. The actuatorengaging location flats 118 and 120 of rotary valve 34 are set inoperative relationship with the actuator 124 by virtue of actuatorrotary translation heads 130 being in operative connection withmechanical, pneumatic, hydraulic, or other rotary drive means well-knownin the actuator arts to accomplish rotary turning of rotary valve 34.

The preferred embodiment of rotary valve 34 is illustrated in FIG. 5through FIG. 9.

In the perspective view of FIG. 5, the rotary valve 34 includes aproximal end 90, a distal end 96, and a middle section 132 of a greaterdiameter than such ends. The proximal end 90 includes an inlet opening134 which is exposed opened to an upper surface 136 of the proximal end90.

As best observed in the sectional view of FIG. 7 taken along line 7—7 ofFIG. 6, the inlet opening 134 neighboring the upper surface 136 ofproximal end 90 is axially aligned to a preferred second inlet opening138 neighboring a lower surface 140 of the proximal end 90 while beingclosed to a first side surface 142 and a second side surface 144 (seeFIG. 6) of the proximal end 90. The rotary valve 34 has a first channelpathway 146 which consists of inlet opening 134 and axially alignedsecond inlet opening 138, a bore passage 148 which is at least partiallysubstantially perpendicular to the inlet opening 134 and second inletopening 138, a first branch outlet opening 150 angled from the borepassage 148 and a second branch outlet opening 152 angled from the borepassage 148. As will be detailed hereinafter, the first channel pathway146 receives liquid, gel, or slurry from a fill tank 112 through theinlet opening 134 and second inlet opening 138 and provides the same tothe piston bore pathway 16.

As best observed in the sectional view of FIG. 9 taken along line 9—9 ofFIG. 8, the rotary valve 34 includes a second channel pathway 84 whichis distinct and segregated from the first channel pathway 146 of therotary valve 34. The second channel pathway 84 could take a variety offorms provided that it has a plurality of inlet openings each capable ofcommunicative alignment with the piston bore pathway 16 of the pistonpump rotary valve assembly 10 and at least one outlet openingcommunicative with such second channel pathway inlet openings. Asillustrated in FIG. 9 the second channel pathway 84 preferably isgenerally X-shaped having an upper distal side opening 154 and an upperproximal side opening 156 at an upper portion 158 of its general X-shapeand a lower distal side opening 160 and a lower proximal side opening162 at a lower portion 164 of its general X-shape.

The operation of the rotary valve 34 of the present invention and itsfirst channel pathway 146 and second channel pathway 84 relative apiston pump rotary valve assembly 10 is illustrated in FIG. 12 throughFIG. 15.

FIG. 12 is a sectional view of a piston pump rotary valve assembly 10communicative with liquid, gel, or slurry 166 from a fill tank 112 andillustrates a first cycle location 168 of the rotary valve 34 whereinthe first channel pathway 146 is in a first operative fill position toprovide the liquid, gel, or slurry 166 to the piston pump pathway 16 perpiston 14 being in a fill suction mode with the liquid, gel, or slurry166 moving in product flow direction A. The first cycle location 168 ofthe rotary valve 34 disposes inlet opening 134 of the first channelpathway 146 to an operative open position relative the liquid, gel orslurry 166 contained in fill tank 112 allowing the liquid, gel or slurry166 to gravity/suction feed into the inlet opening 134, the axiallyaligned second inlet opening 138, the bore pathway 148, and outletopening 150 of the first channel pathway 146, so as to fill a meteredamount of the liquid, gel, or slurry 166 into piston bore pathway 16 bysuction upon withdrawal or up-stroke of piston 14. During this firstcycle location of the rotary valve 34, the second channel pathway 84 ofrotary valve 34 has been vertically rotated to a first inoperativeposition wherein the second channel pathway 84 is orientated traverse tothe piston bore pathway 16 and the inner annular wall surface 170 of themiddle section 132 of the rotary valve 34 blocks the liquid, gel, orslurry 166 from fluid communication into nozzle mount bore pathway 76 ofthe nozzle mount 24 for final discharge from the nozzle 26.

FIG. 13 is a sectional view of a piston pump rotary valve assembly 10blocked from communication with the liquid, gel, or slurry 116 from thefill tank 112, and illustrates a quarter turn of the rotary valve fromits first cycle location 168 to a new second cycle location 172 whereinthe second channel pathway 84 is in a first operative discharge positionto receive the liquid, gel, or slurry 166 from the piston pump pathway16 and allow for ultimate discharge of the same per piston 14 being in adrive discharge mode due with the liquid, gel, or slurry 166 of pistonpump pathway being in product flow direction B. The second cyclelocation 172 of the rotary valve 34 is a first operative position of thesecond channel pathway 84 wherein the upper proximal side opening 156and the lower distal side opening 160 of the second channel pathway 84defines an angled discharge pathway 174 for the metered amount ofliquid, gel, or slurry 166 taken into piston bore pathway 16 during theprevious first cycle location 168 of rotary valve 34. When piston 14moves down-stroke to a drive or discharge position within the pistonbore pathway 16, the liquid, gel, or slurry 166 within piston borepathway 16 enters the upper proximal side opening 156 of the secondchannel pathway 84 and passes downwardly and angularly to the lowerdistal side opening 160 of the second channel pathway 84 for entry intonozzle mount bore pathway 76 of the nozzle mount 24 for final dischargefrom the nozzle 26. During the second cycle location 172, the firstchannel pathway 146 of rotary valve 34 has been vertically rotated aquarter turn disposing the second side surface 144 of the proximal end90 of rotary valve 34 to the liquid, gel, or slurry 166 contained intank 112 thereby closing the first channel pathway 146 to the same andestablishing a first inoperative position of the first channel pathway.At second cycle location 172, the first channel pathway 146 isorientated traverse to the piston bore pathway 16 and the interior wallsurface 176 of the middle section 132 of the rotary valve 34 segregatesthe liquid, gel, or slurry 166 being driven from piston bore pathway 16from first channel pathway 146.

FIG. 14 is a sectional view of a piston pump rotary valve assembly 10communicative with liquid, gel, or slurry 166 from a fill tank 112 whichis similar to FIG. 12. FIG. 13 illustrates another quarter turn of therotary valve 34 from the second cycle location 172 to a new third cyclelocation 178 of the rotary valve 34 wherein the first channel pathway146 is in a second operative recharge position to again provide theliquid, gel, or slurry 166 to the piston pump pathway 16 per piston 14being in a recharge suction mode with the liquid, gel, or slurry 166moving in product flow direction C. The third cycle location 178 of therotary valve 34 disposes second inlet opening 138 of the first channelpathway 146 to an operative open position relative the liquid, gel orslurry 166 contained in fill tank 112 allowing the liquid, gel or slurry166 to gravity/suction feed into the second inlet opening 138, theaxially aligned inlet opening 134, the bore pathway 148, and outletopening 152 of the first channel pathway 146, so as to fill a meteredamount of the liquid, gel, or slurry 166 into piston bore pathway 166 bysuction upon withdrawal or recharge up-stroke of piston 14. During thisthird cycle location of the rotary valve 34, the second channel pathway84 of rotary valve 34 has been vertically rotated to a secondinoperative position wherein the second channel pathway 84 is againorientated traverse to the piston bore pathway 16 and the inner annularwall surface 170 of the middle section 132 of the rotary valve 34 againblocks the liquid, gel, or slurry 166 from fluid communication intonozzle mount bore pathway 76 of the nozzle mount 24 for final dischargefrom the nozzle 26.

FIG. 15 is a sectional view of a piston pump rotary valve assembly 10again blocked from communication with the liquid, gel, or slurry 116from the fill tank 112, which is similar to FIG. 13. FIG. 15 illustratesyet another quarter turn of the rotary valve 34 from its third cyclelocation 178 to a new fourth cycle location 180 wherein the secondchannel pathway 84 is in a second operative discharge position toreceive the recharge liquid, gel, or slurry 166 from the piston pumppathway 16 and allow for ultimate discharge of the same per piston 14being in a second drive discharge mode with the liquid, gel, or slurry166 of piston pump pathway moving in product flow direction D. In thefourth cycle location 180, the second channel pathway 84 is disposedsuch that the lower proximal side opening 162 and the upper distal sideopening 154 of the second channel pathway 84 defines an angled dischargepathway 182 for the metered amount of recharge liquid, gel, or slurry166 taken into piston bore pathway 16 during the previous third cyclelocation 178 of rotary valve 34. When piston 14 moves down-stroke to asecond drive or discharge position within the piston bore pathway 16,the liquid, gel, or slurry 166 within piston bore pathway 16 enters thelower proximal side opening 162 of the second channel pathway 84 andpasses downwardly and angularly to the upper distal side opening 154 ofthe second channel pathway 84 for entry into nozzle mount bore pathway76 of the nozzle mount 24 for final discharge from the nozzle 26. Duringthe fourth cycle location 180, the first channel pathway 146 of rotaryvalve 34 has been vertically rotated a quarter turn disposing the firstside surface 142 of the proximal end 90 of rotary valve 34 to theliquid, gel, or slurry 166 contained in tank 112 thereby closing thefirst channel pathway 146 to the same and establishing a secondinoperative position of the first channel pathway. At fourth cyclelocation 172, the first channel pathway 146 is again orientated traverseto the piston bore pathway 16 and the interior wall surface 176 of themiddle section 132 of the rotary valve 34 again segregates the liquid,gel, or slurry 166 being driven from piston bore pathway 16 from firstchannel pathway 146.

The four cycle locations of the rotary valve illustrated at FIG. 12through FIG. 15 are established by one-quarter circumferential turns ofthe rotary valve and respectively correspond to four quarterly turns ofthe rotary valve 34, such as quarterly rotations to a 0 degree firstcycle location, a 90 degree second cycle location, a 180 degree thirdcycle location, and a 270 degree fourth cycle location.

The movement from cycle to cycle through the four cycle locations 168,172, 178, and 180 provides an important impeller action mixing theliquid, gel, or slurry 166 just prior to any entry of the same intofirst channel passageway entry. In this regard, as observed by comparingthe proximal end 90 of rotary valve 43 as illustrated in FIG. 6 to thesame proximal end 90 in FIG. 7 (or comparing the same proximal end 90 inFIG. 8 to FIG. 9), the width from the upper surface 136 to the lowersurface 140 surface of proximal end 90 is importantly greater than thewidth from the first side surface 142 to the second side surface 144 ofthe rotary valve proximal end 90. This difference allows the rotaryvalve proximal end 90 to form and define an impeller which stirs andmixes any liquid, gel, or slurry within impeller displacement zones 182and 184 (see FIG. 13 and FIG. 15)immediately adjacent to first sidesurface 142 and second side surface 144 respectively of the rotary valveproximal end 90. The liquid, gel, or slurry 166 within impellerdisplacement zones 182 and 184 is subject to displacement and stirringupon rotary turning of the rotary valve 34 by the greater width of theupper surface 136 to the lower surface 140 of the rotary valve proximalend 90 thereby breaking up clumps, sediment, impurities, or lack ofconsistency in the liquid, gel, or slurry 166 just prior to entry of thesame to the first channel pathway 146 of the rotary valve 34 whichsupplies the liquid, gel, or slurry to the piston pump pathway 16.

FIG. 10 is perspective view of a piston pump rotary valve assembly tankdispenser 190 constructed in accordance with the teachings of thepresent invention and illustrates a plurality of piston pump rotaryvalve assemblies 10 mounted in annular alignment about the circumferenceof a fill tank 112 thereby providing multiple piston pump rotary valveassembly workstations 192 to the piston pump rotary valve tank dispenser190.

FIG. 11 is a side perspective view of the piston pump rotary valveassembly tank dispenser 190 of FIG. 10 connected to a turret 194 so asto multiple piston pump rotary valve assembly workstations 192 composedof a plurality of piston pump rotary valve assemblies 10 to dischargeliquid, gel, or slurry to a workpiece 196 (herein illustrated such as AAbattery) set upon a workpiece support 198.

From the foregoing description, it will be apparent that the alternaterecharge and discharge rotary valve, rotary valve piston pump assembly,and assembly tank dispenser of the present invention has a number ofadvantages, some of which have been described above and others of whichare inherent in the invention. Also, it will be understood thatmodifications can be made to the alternate recharge and discharge rotaryvalve, rotary valve piston pump assembly, and assembly tank dispenser ofthe present invention, and its component parts, their orientation, or toenvironments of usage described above without departing from theteachings of the present invention. Accordingly, the scope of theinvention is only to be limited as necessitated by the accompanyingclaims.

I claim:
 1. A rotary valve for use in a piston pump assembly todischarge a metered amount of liquid, gel, or slurry comprising a valvebody having a first channel pathway and a second channel pathway, saidfirst channel pathway having an inlet opening to receive a liquid, gel,or slurry and an outlet opening to provide said liquid, gel, or slurryto a pathway of said piston pump assembly, said second channel pathwayhaving a plurality of inlet openings each capable of communicativealignment with said pathway of said piston pump assembly and at leastone outlet opening communicative with said inlet openings, said valvebody being capable of rotation with respect to said piston pump assemblyto dispose said inlet opening of said first channel pathway to anoperative position to receive fluid communication of said liquid, gel,or slurry through said first channel pathway and provide the same tosaid pathway of said piston pump assembly and an inoperative positionclosing said first channel pathway from such fluid communication, andsaid valve body being capable of rotation with respect to said pistonpump assembly to dispose said second channel pathway to an operativeposition in communicative alignment with said pathway of said pistonpump assembly to discharge said liquid, gel, or slurry from said pistonpump assembly and an inoperative position to prevent said discharge. 2.The rotary valve of claim 1 wherein said first channel pathway issegregated from said second channel pathway.
 3. The rotary valve ofclaim 1 wherein said second channel pathway it is substantiallyperpendicular to said inlet opening of said first channel pathway. 4.The rotary valve of claim 1 wherein a portion of said first channelpathway is substantially perpendicular to said inlet opening of saidfirst channel pathway.
 5. The rotary valve of claim 1 wherein saidoutlet opening of said first channel pathway is angled from a portion ofsaid first channel pathway.
 6. The rotary valve of claim 1 wherein saidsecond channel pathway rotates on a vertical axis relative saidpiston-pump assembly.
 7. The rotary valve of claim 1 wherein said secondchannel pathway is disposed in its operable discharge position whenrotated in vertical alignment with said piston pump assembly.
 8. Therotary valve of claim 1 wherein said second channel pathway is disposedin its inoperable closed position when rotated traverse to said pistonpump assembly.
 9. The rotary valve of claim 1 wherein said first channelpathway is disposed in its operable receiving position when said secondchannel pathway is disposed in its inoperable closed position.
 10. Therotary valve of claim 1 wherein said second channel pathway is disposedin its operable discharge position when said first channel pathway isdisposed in its inoperable closed position.
 11. The rotary valve ofclaim 1 wherein said rotary valve has an end portion rotatablyfunctioning as an impeller to stir liquid, gel, or slurry within animpeller displacement zone.
 12. The rotary valve of claim 1 wherein saidsecond channel pathway is generally X-shaped and has an upper distalside opening, an upper proximal side opening, a lower distal sideopening, and a lower proximal side opening.
 13. The rotary valve ofclaim 12 wherein said upper proximal side opening or said lower proximalside opening of said second channel pathway defines a point of entry forsaid liquid, gel, or slurry from said piston pump assembly to said valvebody when said second channel pathway is in its operative dischargeposition.
 14. The rotary valve of claim 12 wherein said upper distalside opening or said lower distal side opening of said second channelpathway defines a discharge exit for said liquid, gel, or slurryprovided to said valve body when said second channel pathway is in itsoperative discharge position.
 15. The rotary valve of claim 12 whereineither said upper proximal side opening and said lower distal sideopening of said second channel pathway or said lower proximal sideopening and said upper distal side opening of said second channelpathway defines an angled discharge pathway for said liquid, gel, orslurry through said valve body when said second channel pathway is inits operative discharge position.
 16. The rotary valve of claim 12wherein said first channel pathway further includes a second inletopening substantially axially aligned with said inlet opening andwherein said valve body is rotatable to four cycle locations, a firstcycle location being a first operative position of said first channelpathway wherein liquid, gel, or slurry is provided to a pathway of thepiston pump assembly, and a first inoperative position-of said secondchannel pathway, a second cycle location being a first operativeposition of said second channel pathway wherein said upper proximal sideopening and said lower distal side opening of said second channelpathway defines a discharge pathway for said liquid, gel, or slurry anda first inoperative position of said first channel pathway, a thirdcycle location being a second operative position of said first channelpathway wherein liquid, gel, or slurry is provided to a pathway of thepiston pump assembly, and a second inoperative position of said secondchannel pathway, and a fourth cycle location being a second operativeposition of said second channel pathway wherein said lower proximal sideopening and said upper distal side opening of said second channelpathway defines a discharge pathway for said liquid, gel, or slurry anda second inoperative position of said first channel pathway.
 17. Therotary valve of claim 16 wherein said four cycle locations respectivelycorrespond to four quarterly turns of said rotary valve.
 18. A pistonpump rotary valve assembly for use in discharging a metered amount ofliquid, gel, or slurry comprising a piston body attached to a valvehousing, said piston body having a piston bore pathway thereincommunicative with a valve body set within said valve housing, a pistonoperable to a withdraw recharge cycle position and a drive dischargecycle position within said piston bore pathway, a valve body set withinsaid valve housing having a first channel pathway and a second channelpathway, said first channel pathway of said valve body having an inletopening to receive a liquid, gel, or slurry and an outlet opening toprovide said liquid, gel, or slurry to said piston bore pathway of saidpiston body during said withdraw recharge cycle position of said piston,said second channel pathway of said valve body having a plurality ofinlet openings each capable of communicative alignment with said pistonbore pathway and at least one outlet opening communicative with saidinlet openings, said valve body being capable of rotation with respectto said piston body to dispose said inlet opening of said first channelpathway to an operative position to receive fluid communication of saidliquid, gel, or slurry through said first channel pathway and providethe same to said piston bore pathway and an inoperative position closingsaid first channel pathway from such fluid communication, said valvebody being capable of rotation with respect to said piston body todispose said second channel pathway to an operative position to receivesaid liquid, gel, or slurry from said piston bore pathway during a drivedischarge position of said piston assembly and an inoperative positionto prevent said reception, and a nozzle having a discharge boreinterconnected with said valve housing, said discharge bore beingcommunicative with said second channel pathway during its operativeposition to dispense said liquid, gel, or slurry.
 19. The piston pumprotary valve assembly of claim 18 wherein said first channel pathwayfurther includes a second intake opening substantially aligned with saidintake opening and a second outlet opening.
 20. The piston pump rotaryvalve assembly of claim 18 wherein said second channel pathway rotateson a vertical axis relative said piston body.
 21. The piston pump rotaryvalve assembly of claim 18 wherein said valve body has an end portionrotatably functioning as an impeller to stir liquid, gel, or slurrywithin an impeller displacement zone.
 22. The rotary valve of claim 18wherein said second channel pathway is generally X-shaped and has anupper distal side opening, an upper proximal side opening, a lowerdistal side opening, and a lower proximal side opening.
 23. The pistonpump rotary valve assembly of claim 22 wherein said upper proximal sideopening or said lower proximal side opening of said second channelpathway receives said liquid, gel, or slurry from said piston borepathway when said second channel pathway is i n its operative position.24. The piston pump rotary valve assembly of claim 22 wherein said upperdistal side opening or said lower distal side opening of said secondchannel defines a discharge exit to said nozzle for said liquid, gel, orslurry provided to said valve body when said second channel pathway isin its operative position.
 25. The piston pump rotary valve assembly ofclaim 22 wherein either said upper proximal side opening and said lowerdistal side opening of said second channel pathway or said lowerproximal side opening and said upper distal side opening of said secondchannel pathway defines an angled discharge pathway for said liquid,gel, or slurry through said valve body when said second channel pathwayis in its operative position.
 26. The piston pump rotary valve assemblyof claim 22 wherein said valve body further includes a second inletopening substantially axially aligned with said inlet opening andwherein said valve body is rotatable to four cycle locations, a firstcycle location being a first operative position of said first channelpathway wherein liquid, gel, or slurry is provided to said piston borepathway of said piston body, and a first inoperative position of saidsecond channel pathway, a second cycle location being a first operativeposition of said second channel pathway wherein said upper proximal sideopening and said lower distal side opening of said second channelpathway defines a discharge pathway for said liquid, gel, or slurry anda first in operative position of said first channel pathway, a thirdcycle location being a second operative position of said first channelpathway wherein liquid, gel, or slurry is provided to said piston borepathway of said piston body, and a second inoperative position of saidsecond channel pathway, and a fourth cycle location being a secondoperative position of said second channel pathway wherein said lowerproximal side opening and said upper distal side opening of said secondchannel pathway defines a discharge pathway for said liquid, gel, orslurry and a second inoperative position of said first channel pathway.27. The piston pump rotary valve assembly of claim 26 wherein said fourcycle locations respectively correspond to four quarterly turns of saidvalve body.
 28. A piston pump rotary valve assembly tank dispenser fordischarging, a metered amount of liquid, gel, or slurry comprising afill tank for supplying a liquid, gel, or slurry, a piston pump rotaryvalve assembly attached to and communicative with said tank, said pistonpump assembly including a piston body attached to a valve housing, saidpiston body having a piston bore pathway therein communicative with avalve body set within said valve housing, a piston operable to awithdraw recharge cycle position and a drive discharge cycle positionwithin said piston bore pathway, a valve body set within said valvehousing and extending at least partially within said fill tank, saidvalve body having a first channel pathway and a second channel pathway,said first channel pathway of said valve body having an inlet openingextended within said fill tank to receive a liquid, gel, or slurry ofsaid fill tank and to provide the same to said piston bore pathway ofsaid piston body during said withdraw recharge cycle position of saidpiston, said second channel pathway of said valve body having aplurality of inlet openings each capable of communicative alignment withsaid piston bore pathway and at least one outlet opening communicativewith said inlet openings, said valve body being capable of rotation withrespect to said piston body to dispose said inlet opening of said firstchannel pathway to both an operative position to receive said liquid,gel, or slurry and provide the same to said piston bore pathway and aninoperative position closing said first channel pathway from fluidcommunication with said liquid, gel, or slurry, said valve body beingcapable of rotation with respect to said piston body to dispose saidsecond channel pathway to an operative position to receive said liquid,gel, or slurry from said piston bore pathway during a drive dischargeposition of said piston assembly and an inoperative position to preventsaid reception, and a nozzle having a discharge bore interconnected withsaid valve housing, said discharge bore being communicative with saidsecond channel pathway during its operative position to dispense saidliquid, gel, or slurry.
 29. The piston pump rotary valve assembly tankdispenser of claim 28 wherein said first channel pathway furtherincludes a second intake opening substantially aligned with said intakeopening and a second outlet opening.
 30. The piston pump rotary valveassembly tank dispenser of claim 28 further including a plurality ofsaid piston pump rotary valve assemblies attached to and in fluidcommunication with said fill tank.
 31. The piston pump rotary valveassembly tank dispenser of claim 28 wherein said second channel pathwayrotates on a vertical axis relative said piston body.
 32. The pistonpump rotary valve assembly tank dispenser of claim 28 wherein said valvebody has an end portion rotatably functioning as an impeller to stirliquid, gel, or slurry within an impeller displacement zone.
 33. Thepiston pump rotary valve assembly tank dispenser of claim 28 whereinsaid second channel pathway is generally X-shaped and has an upperdistal side opening, an upper proximal side opening, a lower distal sideopening, and a lower proximal side opening.
 34. The piston pump rotaryvalve assembly tank dispenser of claim 33 wherein said upper proximalside opening or said lower proximal side opening of said second channelpathway receives said liquid, gel, or slurry from said piston borepathway when said second channel pathway is in its operative position.35. The piston pump rotary valve assembly tank dispenser of claim 33wherein said upper distal side opening or said lower distal side openingof said second channel defines a discharge exit to said nozzle for saidliquid, gel, or slurry provided to said valve body when said secondchannel pathway is in its operative position.
 36. The piston pump rotaryvalve assembly tank dispenser of claim 33 wherein either said upperproximal side opening and said lower distal side opening of said secondchannel pathway or said lower proximal side opening and said upperdistal side opening of said second channel pathway defines an angleddischarge pathway for said liquid, gel, or slurry through said valvebody when said second channel pathway is in its operative position. 37.The piston pump rotary valve assembly tank dispenser of claim 33 whereinsaid valve body further includes a second inlet opening substantiallyaxially aligned with said inlet opening and wherein said valve body isrotatable to four cycle locations, a first cycle location being a firstoperative position of said first channel pathway wherein liquid, gel, orslurry is provided to said piston pathway bore of said piston body, anda first inoperative position of said second channel pathway, a secondcycle location being a first operative position of said second channelpathway wherein said upper proximal side opening and said lower distalside opening of said second channel pathway defines a discharge pathwayfor said liquid, gel, or slurry, and a first inoperative position ofsaid first channel pathway, a third cycle location being a secondoperative position of said first channel pathway wherein liquid, gel, orslurry is provided to said pathway bore of said piston body, and asecond inoperative position of said second channel pathway, and a fourthcycle location being a second operative position of said second channelpathway wherein said lower proximal side opening and said upper distalside opening of said second channel pathway defines a discharge pathwayfor said liquid, gel, or slurry, and a second inoperative position ofsaid first channel pathway.
 38. The piston pump rotary valve assemblytank dispenser of claim 37 wherein said four cycle locationsrespectively correspond to four quarterly turns of said valve body.